Wrench.



No; 645,074. Patented Mar. l3, I900. .c. c. ENGLISH.

WRENCH.

(Application filed. Apr. 4, 1898.

(No Model.)

wa ln e s 5 es. Z7 venz'o n @Q:; r 'cwwwg Kg ileirrnn STATES PATENT OFF CE.

CLARENCE O. ENGLISH, OF IIOOD RIVER, OREGON.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 645,074, dated March 13, 19QO. Application filed April 4,1898. $erial No. 676,498. (No model.)

To ctZZ whom it may concern:

Be it known that I, CLARENCE C. ENGLISH, a citizen of the United States, residing at Hood River, in the county of VVasco and State of Oregon, have invented a new and useful WVrench, of which the following is a specification.

My invention relates to wrenches with a movable jaw locking by means of teeth on the under side of the shank engaging with similar teeth in the sliding jaw locked and held in place by means of a cam; and the objects of myiinprovement are, first,to provide means for locking the sliding jaw automatically; second, to provide means to keep the sliding jaw from coming unlocked until desired, and, third, to do away with axles on the lockingcam and also the bearings for said axles. I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a side elevation with the sliding jaw shown in longitudinal section through the back of the sleeve on the lines 3 4, Fig. 2, and along the inner surface of one of the side plates, showing the wrench locked. Fig. 2 is a top view of the movable jaw and part of the shank. Fig. 3 is aside elevation of the entire wrench unlocked. Fig. 4 is a cross-section of the wrench on the lines 1 2, Fig. 3. Fig. 5 is a top view of the locking-cam as it appears when the wrench is unlocked. Fig. 6 is a top view of the locking-cam as it appears when the wrench is locked. Fig. '7 is an end view of the locking-cam. Fig. Sis an end view of the spiral locking-spring.

Similar letters refer to similar parts throughout the several views.

The shank A, with its teeth B and rigid jaw G, constitutes the body of the wrench. The shank A also serves as a handle. The jaw D is provided with teeth F and sleeve G, which fits down over theshank A and is fastened to the jaw D with the rivets H H. Between the back of shank A and the inside of sleeve G is seated a roller-cam l, which is provided with athumb-leverJandaspindle K. Spindle K is provided with a head L. The lever J is provided with a small aperture M, through which an end of a spiral springN passes and which is bent around the side of the lever J and wound around the spindle K and fastened to the projection O, as shown in Fig. 1; Projection 0 projects out from the edge of the back of sleeve G. In the sleeve G is an aperture P, through which the lever J projects.

- to the desired position the pressure is removed from the thumb-lever J, and the spring N.

turns the lever J back in a reversedirection until it comes in contact with the upper edge of the aperture P. The spring N holds the lever J against the upper edge of aperture P until lever J is again pressed down. When the leverJ comes up against the upperedge of aperture P, it brings the thick part of the rollercam I directly between the center of the back of the sleeve G and shank A and lifts the jaw D upward, engaging the teeth F with the teeth B, and thereby locks the wrench. The lever J forms a shoulder on the cam I and spindle K, and, coming in contact with the sides of the aperture P, through which it extends, keeps the cam I in place. The head L on the spindle K comes in contact with the back of shank A and the under side of pro-.

jection 0 when lever J is turned down and keeps the back end of the sleeve G from being pressed down too far when unlocked, which would raise the forward end and engage some of the teeth F in the forward end of the jaw D with the teeth B in the shank A and alsoserves to keep the spring the end of the spindle K.

The wrench may be constructed with the roller-cam seated between the lower edge of the shank and the inside of the movable jaw,

N from slipping off having the teeth B made on the back of the shank, sleeve G made flat across the top, and the teeth F in the sliding jaw madein theinside of the back of the sleeve G, and the spring N and spindle K may be placed on the opposite end of the roller cam; but I prefer to carry out my invention as shown in the accompanying drawings.

I am aware that prior to my invention wrenches were made with a sliding jaw and locked by means of teeth in the sliding jaw engaging with similar teeth in the shank having a roller-cam with thumb-lever seated between the back of the shank and the inside of the sleeve of the movable jaw. I therefore do not claim the combination, broadly;

' but roller-cam seated between the back of the sliding jaw and the upper edge of the shank of the rigid jaw extending longitudinally along the back of said shank, having a spiral spring N, on the spindle K,- one end of said spiral spring being inserted in the aperture 0, of lever J, and bent around the side of said lever and wound around the spindle K, the other end of said spring being fastened to the projection O,substantially as described.

OLAREN CE 0. ENGLISH.

Witnesses:

EZRA L. SMITH, GEO. P. OROWELL. 

